/home/jan/avidemux2/avidemux_core/ADM_coreVideoCodec/ADM_hwAccel/ADM_coreLibVA/src/ADM_coreLibVA.cpp: In static member function Ã¢â‚¬Ëœstatic bool admLibVA::supported(VAProfile)Ã¢â‚¬â„¢:/home/jan/avidemux2/avidemux_core/ADM_coreVideoCodec/ADM_hwAccel/ADM_coreLibVA/src/ADM_coreLibVA.cpp:489:16: error: Ã¢â‚¬ËœVAProfileVP9Profile3Ã¢â‚¬â„¢ was not declared in this scope SUPSUP(VAProfileVP9Profile3,configVP9) ^

It is again an issue with an older libva version in Ubuntu 14.04.5. VAProfileVP9Profile3 is missing there in the list of available profiles in va.h from libva-dev. The commit [libva] Use our new cflags might have exposed the issue.

-- Checking for LIBVA-- *******************-- Found va/va.h-- Checking it is the right version...-- yes-- Checking for HEVC decoder, result is TRUE-- HEVC decoder is supported-- Checking for VP9 decoder, result is TRUE-- VP9 decoder is supported-- Checking for DUMMY decoder, result is FALSE-- DUMMY decoder is not supported -- LibVA cflags=<-DLIBVA_HEVC_DEC;-DLIBVA_VP9_DEC>-- Found LIBVA

libva on Ubuntu 14.04.5 doesn't support HEVC either, so even if the VP9 check really only checked for HEVC (which I gloriously missed looking at the patch ), the result should have been negative, shouldn't it? Anyway, Jan will find it out soon.

No, features supported via VDPAU are not related. CMake tries to compile libva_hevcdec.cpp from the cmake/cmake_compile_check folder. If it succeeds, the feature is supported. If it fails to compile, it is not. Copy this file e.g. to /tmp/, go the /tmp and run